Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 1221 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 190 mm |
| Width | B | 36 mm |
| Basic dynamic load rating | C | 75 kN |
| Basic static load rating | C0 | 32.5 kN |
| Fatigue load limit | Pu | 1.69 kN |
| Reference speed | nref | 4350 r/min |
| Limiting speed | nG | 5700 r/min |
| Mass | ≈m | 4.59 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Internal clearance | CN (Group N) — Normal internal clearance | |
| Sealing | Without — Not sealed | |
| Cage | M — Solid brass cage, ball guided | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 150 °C |
Precision classification2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial ball bearing tolerance equivalent | ABEC 1Derived from ISO Normal; not a direct ABEC marking | |
| Mapping basis | ISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value. |
Product characteristics6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore type | Z | Cylindrical |
| Type of Seal | Without | Not sealed |
| Cage | M | Solid brass cage, ball guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Radial internal clearance | CN (Group N) | Normal internal clearance |
| Lubricant | Without | Bearing not greased |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 190 mm7.48 in |
| Width | B | 36 mm1.417 in |
| Basic dynamic load rating, radial | Cr | 75,000 N16,861.511 lbf |
| Basic static load rating, radial | C0r | 32,500 N7,306.655 lbf |
| Fatigue load limit, radial | Cur | 1,690 N379.946 lbf |
| Limiting speed | nG | 5,700 1/min |
| Reference speed | nϑr | 4,350 1/min |
| Mass | ≈m | 4.59 kg10.119 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 117 mm4.606 in |
| Maximum diameter of housing shoulder | Da max | 178 mm7.008 in |
| Maximum fillet radius | ra max | 2.1 mm0.083 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2.1 mm0.083 in |
| Shoulder diameter outer ring | D1 | 164.3 mm6.469 in |
| Shoulder diameter inner ring | d1 | 133.9 mm5.272 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 150 °C302 °F |
Calculation factors4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.18 |
| Dynamic axial load factor | Y1 | 3.52 |
| Dynamic axial load factor | Y2 | 5.45 |
| Static axial load factor | Y0 | 3.69 |
Capabilities & suitability8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Axial load capacity in both directions | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes | |
| Staticangularerrorandmisalignment | Yes | |
| Dynamicangularerrorandmisalignment | Yes |
Manufacturer Identity10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 365804 | |
| Brand | FAG | |
| Base Type | 1221 | |
| Old Designation | ["1221M"] | |
| X Life Marking | n.r. | |
| SAP material number | 0190100520000 | |
| Base product | 2305080601 | |
| Bearing X designation | 1221-M | |
| Mounting Manager ID | 1221-M | |
| Grease application ID | 1221-M |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Self-aligning ball bearing 12..-M, solid brass cage | |
| Short Description | Self-aligning ball bearing |
Technical Data20 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 190 mm | |
| Width (B) | 36 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 75,000 N | |
| Basic Static Load Rating, Radial (C0R) | 32,500 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 5,700 1/min | |
| Operating Temperature Max. (Tmax) | 150 °C | |
| Reference Speed (Nϑr) | 4,350 1/min | |
| Fatigue Load Limit, Radial (Cur) | 1,690 N | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.18 | |
| Minimum Diameter Shaft Shoulder (Da Min) | 117 mm | |
| Shoulder Diameter Inner Ring (D1) | 133.9 mm | |
| Dynamic Axial Load Factor (Y1) | 3.52 | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 178 mm | |
| Minimum Chamfer Dimension (Rmin) | 2.1 mm | |
| Maximum Fillet Radius (Ra Max) | 2.1 mm | |
| Shoulder Diameter Outer Ring (D1) | 164.3 mm | |
| Dynamic Axial Load Factor (Y2) | 5.45 | |
| Static Axial Load Factor (Y0) | 3.69 |